An Overview of High‐Temperature Superconducting Cables in DC Systems: Unlocking Potential for High‐Voltage DC Networks

ABSTRACT This paper provides an overview of high‐temperature superconducting (HTS) cables in DC systems, with a focus on their deployment in high‐voltage DC (HVDC) networks. The assessment of HTS cable properties—such as extremely low electrical resistance, high current‐carrying capacity and a compact geometry—and their comparison with those of traditional cables is conducted in this paper. DC projects at various voltage levels, both implemented and ongoing, are studied, and data on technical specifications, project scales, and deployment challenges are presented. This analysis shows that, although initial capital expenses remain higher, notable benefits, including reduced footprint, high capacity and low‐loss power transmission, can offset upfront investments in utility‐scale deployments in the long run. Eventually, HTS technology stands as a promising enabler for next‐generation HVDC networks, supporting global efforts to meet rising electricity demand and carbon‐reduction targets.